Pipe cutter



Dec. 3, 1957 E. J. CHARLES 2,81

PIPE CUTTER Filed. June 6, 1956 2 Sheets-Sheet 1 'Fig Tigiz...

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ETHH. RED CIMRL 5 5 HTT'OR E 1 2 Sheets-s 2 1 CHARLES PIPE cu Filed J 6' 1956 5 m me 0 W0 3 I" a 0 4 W H 3 4 M E Y wzv 9 g my 1 4 1 PIPE CUTTER Ethelred J. Charles, Brooklyn, N. Y.

Application June 6, 1956, Serial No. 589,747

' 1 Claim. (11. 30-94 This invention relates to improvements in pipe cutters and more particularly to the pipe cutter disclosed in my application bearing Serial No. 377,118, now abandoned.

An object of the invention is to provide a guide means that will maintain the pipe cutter in proper cutting position while it is being revolved around the pipe section being cut.

The pipe cutter embodying the invention comprises a body having a fixed jaw and a movable jaw and the guide means is associated with the movable jaw for the proper alinement thereof.

With the above and other objects and advantages in view, the invention consists of the novel details of construction, arrangement and combination of parts more fully hereinafter described, claimed and illustrated in the accompanying drawings in which:

Fig. 1 is a side elevational view of a pipe cutter embodying the invention;

Fig. 2 is a front elevational view of Fig. 1;

Fig. 3 is a transverse sectional view on the line 33 of Fig. 1;

Fig. 4 is a longitudinal sectional view on the line 44 of Fig. 2;

Fig. 5 is a detailed fragmentary view of a guide means for the pipe cutter;

Fig. 6 is a perspective view of the movable jaw of the pipe cutter;

Fig. 7 is a detailed fragmentary sectional view on the line 77 of Fig. 5;

Fig. 8 is an elevational end view of a section of the guide means; and

Fig. 9 is an elevational side view of the guide means of Fig. 8.

Referring more in detail to the drawings, wherein like parts are designated by like reference numerals, the reference numeral 10 is used to generally designate a pipe cutter embodying the invention.

The pipe cutter 10 comprises a C-clamp 11 having an arcuate shaped fixed jaw 12 at one end thereof. The C-clamp 11 is T-shaped in cross-section and the fixed jaw 12 has a flat inner face 13, which is provided with a centrally radially disposed opening 14. Positioned in the opening 14 is a bit 15 that may be retained therein by any well known fastening means 16. The bit 15 projects beyond the flat arcuate shaped face 13 of the fixed jaw 12 and is adapted to penetrate a pipe section.

The C-clamp 11 has an opposite end 17 that extends laterally from the end of a central portion 18 thereof. The central portion 18 of the C-clamp 11 has a straight inner face 19, which extends at right angles to an inner flat face 20 of the end 17.

The end 17 has an internally threaded hub portion 21 that is axially alined with the opening 14 in the fixed jaw 12.

A screw operating rod 22 is threadedly carried by the hub portion 21 and a transversely disposed handle 23 is provided at the outer end of the rod 22. The rod 22 is ice 2 threaded at 24 to correspond with the threads of the hub portion 21 and a ball 25 is formed on the inner end of the rod 22 at the termination of the threads 24.

The ball 25 is seated in a complementary semi-circular shaped socket 26 in a movable jaw 27. The movable jaw 27 has a fiat face 28 that is complementary to the flat face 20 of the end 17.

The flat face 28 of the movable jaw 27 has a rectangular shaped recess 29 therein that is circumjacent to the socket 26 to receive a holding plate 30 of a guide 31. The plate 30 has a cutout 32 therein to engage the screw 22 and openings 33 in the plate 30 permit fasteners to pass therethrough to fix the plate to the movable jaw 27.

Extending from the plate 30 at right angles thereto is a substantially V-shaped portion 34 of the guide 31. The portion 34 comprises a pair of slightly curved legs 38 and 39.

Each outer end of each of legs 38 and 39 is slot-ted as at 49, Fig. 9, to receive a stub shaft 41 of a guide roller or cutter 42. The movable jaw 27 is provided with a pair of spaced semi-circular shaped recesses 43 and 44, Fig. 6, to receive the rollers or cutters 42 therein. Positioned in the movable jaw 27, intermediate of the recesses 43 and 44, is an opening 45 to receive a bit 46 which is retained therein by a fastener 47.

The inner face 19 of the central portion 18 is provided with a longitudinally axially extending groove 48 which functions as a guide or slideway for a lug 49 that extends laterally from the inner edge of the movable jaw 27 The lug 49 extends for the length of the movable jaw 27 and sliding in the groove 48 mounts the movable jaw 27 in sliding relation to the portion 18 and also prevents rotation of the movable jaw 27 on the ball 25.

The movable jaw 27 has an arcuate flat inner face 50 which is opposed to the inner face 13 of the fixed jaw 12. The rollers or cutters 42 and the bit 46 extend through the surface of the face 50, thus the bits 15 and 46 are in axial alinement and when the jaws 12 and 27 are brought into proximity with each other the bits 15 and 46 will penetrate a pipe section positioned intermediate of the jaws 12 and 27.

As the movable jaw 27 is moved in a straight line toward the fixed jaw 12 within the confines of the C-clamp 11, the movable jaw 27 is prevented from twisting or turning by the groove 48 and lug 49 and a dove tail block 51 engaging in a clove tail slot 52. The block is affixed to the end 17 as indicated at 51a. The rod 22 is rotated by turning the handle 23 and the rotation of the rod 22 moves the movable jaw 27 towards the fixed jaw 12.

While the structure of the pipe cutter is shown in my co-pending application, the improvement constituting the present invention includes the guide means whereby the bits 15 and 46 are retained in perfect alinement to provide a perfect circle cut.

Regardless of how carefully the pipe cutter is used by the operator, there is a chance that the cut will not be in a perfect circle and the guide embodying the invention has been provided to insure a perfect cut and efficient operation at all times.

It is believed that from the foregoing description the operation and construction of the invention will be apparent to those skilled in the art and it is to be understood that changes in the minor details of construction, arrangement and combination of parts may be resorted to provided they fall within the spirit of the invention and the scope of the appended claim.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is:

A guide for a pipe cutter having a body, a fixed jaw and a movable jaw on the body comprising a plate, means for securing said plate to said movable jaw, a substantial- 1y V-shaped portion extending at right angles to said plate and integral therewith, said V-shaped portion including a pair of legs parallel to said movable jaw, and a guide roller mounted on the end of each of said legs, said legs each having an elongated slot therein and each roller hav ing a stub axle slidably mounted in each of said slots.

De Galleford Apr. 14, 1868 Robbins June 24, 1884 .4 Hill Apr. 1, 1890 Borden Feb. 13, 1912 Johnson June 10, 1913 White Aug. 8, 1916 Cramer Feb. 6, 1917 Nonnernan Apr. 16, 1918 Cousineau Aug. 19, 1930 FOREIGN PATENTS Germany May 17, 1890 Switzerland Nov. 1, 1948 

